DSL filter in TNI?

It will work fine, I do this as a matter of course. I disassemble the filter and solder in CAT3 wires so that I can punch the filter into the circuit on a 66 block.

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To be clear, you are doing this *outdoors*? What sort of temperature extremes?

When our phone company installed the service at our new location (there was no service there previously as it was formerly an undeveloped lot) I had the tech install a DSL filter in the NID. I ran CAT5e (as i had a bunch of it already) and used the blue-blue/white pair for voice and the brown-brown/white pair for the DSL. I installed a jack with only the br-br/wh pair connected just for the DSL modem. Works like a charm.

--

Thomas

Yes... there are DSL filters which are specifically designed for outdoor installation at the demarc... that's the way our DSL service was wired up when we had it installed originally. My sense is that they may be better filters, electrically, than the small in-line "microfilter" types... more stages? In any case, I doubt that the tempcos are going to be a problem... they're basically just LC low-pass filters intended to block a wide-spectrum (ultrasonic + LF/HF) signal from getting into the phones and I don't believe they're terribly critical.

--
Dave Platt                                    AE6EO
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Was this filter designed for packaging (and, presumably, also for that environment) *in* the network interface? Or, just a "household filter" CRAMMED into it?

I ran two lengths of CAT5 (instead of two lengths of "quad") -- one for each of two lines (figuring the extra conductors were "cheap insurance" against a future break -- *or* the potential of "fiber to the home" at some point in the future!).

[I wouldn't want POTS and ethernet in the same cable, in that case]

Currently, those two cables run to an "electronics closet". From there, two OTHER cables run to the traditional punchdown blocks (which feed the various telco drops throughout the house).

So, in theory, I could install the filter in that first closet alongside the DSL modem (which has power and ethernet drops available nearby). Then, run the filtered line back out to the punchdown blocks for distribution as POTS.

[The second line/cable could be handled similarly or differently]

The alternative is to move the filter "outside" and treat the line entering the house as "DSL".

It seems like the first option might be more flexible (at the expense of another "wart" on the wall).

Ah, OK. I was leary of the cheap little solvent-welded blob that is intended for use "inline" with each station set.

OK. I haven't explored the frequency ranges used for the carrier. I just figured the ~100+ degree temperature range encountered outdoors was considerably more than what one would expect in a "living space".

Sorry for the delay - computer problems here.

Yes, it was specifically designed for the NID. Snapped right in. Basically it is the normal terminal block with a built-in filter and extra terminals for the DSL pair.

I didn't say I ran ethernet over the same cable. The DSL line is the unfiltered signal from the NID. The voice pair is the filtered signal from the NID.

Nowhere in my post did I mention ethernet *from the NID*.

I have only two of the four pairs used in my Cat5e run from the NID: one (filtered) for voice, the other (unfiltered) for the DSL.

--

Thomas

I will have to grab one of the local linemen and see if they have anything similar that could "fall off their truck"!

Sorry, I didn't mean to suggest that you did!

Note my reference to "the potential of 'fiber to the home' at some point in the future". I.e., when/if truly high speed interfaces become available to the home (like other countries), I don't want to be stuck with a single length of CAT5 that is carrying my POTS

*and* try to squeeze the high speed (fiber) connection over that same cable. "I wouldn't want POTS and ethernet in the same cable, in that case" -- hence the appeal of having run *two* cables.

Understood. Currently I have *one* pair in *one* of the cables with any sort of signal on it. The rest is there because "wire is cheap" (and a LOT cheaper than having to run a new drop LATER!)

I missed that memo. Been duking it out for three days with three different computers here at the fort. All three now running openSUSE 12.1. Wife wanted to set up a her tower with Windows XP running in a virtual machine (there's only two programs she needs that have no Linux equal...yet). Installed VirtualBox, and during the setup and several attempts to install XP, glitches occurred all over the place, with all three systems. Networking problems, laptop decided to take a vacation (several times), and my tower developed a bad spot on the /home partition...*SIGH* Finally got everything sorted out. Be nice to know what exactly happened that started the snowball rolling downhill.

Now You know why i was a bit short there towards you, for which I apologize.

I ran our cable, from the NID to a weatherproof box next to the camper, in 1/2" RNC (PVC conduit). More expensive, yes, but if I ever have to replace the cable for whatever reason, i have a chase in the ground. Just remove the old one and pull in a new one (one reason I own a 300-foot fish tape).

Dig up the yard as few times as possible. (First time I dug the ditch with a mini-excavator; next time might be by hand.) (See my reply in the other thread on this topic as to what I did.)

Cheers, and God Bless.

-- Thomas

Erm, that would be the one about outdoor weatherproof F connectors.

The components are more sensitive to heat than cold, but high ambient tempe ratures outdoors are usually not a problem unless the TNI is in direct sunl ight in Tucson, Arizona. I'd be more concerned about moisture condensing o n the circuits and eventually causing a short with accumulated dust.

I recently switched from DSL to cable service, but for the roughly four yea rs that I had DSL, I had an old DSL filter purchased at an electronics surp lus store mounted in the TNI so that the filtered (voice-only) signal went out on the CAT-5 Line 1 pair to all the house phone jacks and the unfiltere d (voice + DSL carrier) went out on the CAT-5 Line 2 pair just to the room where the computer is. I then used an L1+L2 splitter adapter in the wall j ack so I could plug the phone by the computer into the L1 port and the DSL modem into L2. (This L1+L2 splitter looks very much like the ones that all ow you to plug multiple phones, or a phone plus other device like a FAX int o the same wall outlet, except the latter type only multiplies L1 connectio ns.) The setup worked like a charm. I left the filter in the TNI and the house phones all still work fine.

The reason I used an old surplus filter was because the filters that came w ith the DSL self-install kit were potted and had modular phone connectors a t the input and output. I wanted a filter that could be hard-wired into th e punch-down terminal block in the TNI, so I selected one where I could dis card the housing and solder on flying solid AWG #24 copper wire leads. Bei ng surplus, it was cheap, too.